1. 设A,B均为n阶方阵,下列运算规律正确的是( )。![2A.png](https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202103/7367c1a3f45247b8a1587cb27c40ad87.png);![2D.png](https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202103/fd24c73455a6441d81dd0ce3baed7a4e.png)

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